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selftests/rseq: Fix a building error for riscv arch

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RISC-V rseq selftests include asm/fence.h from tools/arch/riscv,
but the rseq Makefile only adds tools/include in the CFLAGS, this
results in the building failure both for native and cross build:

    In file included from rseq.h:131,
                     from rseq.c:37:
    rseq-riscv.h:11:10: fatal error: asm/fence.h: No such file or directory

To fix it, add the matching tools/arch/$(ARCH)/include path in the
CFLAGS and derive ARCH from SUBARCH for standalone native builds where
ARCH is not set.

Fixes: c92786e179 ("KVM: riscv: selftests: Use the existing RISCV_FENCE macro in `rseq-riscv.h`")
Cc: stable@vger.kernel.org
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Link: https://patch.msgid.link/20260707082348.36896-1-hui.wang@canonical.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Hui Wang 2026-07-07 16:23:48 +08:00 committed by Paul Walmsley
parent 3fb29495b4
commit a2ac823d8a
1 changed files with 5 additions and 1 deletions
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6
tools/testing/selftests/rseq/Makefile
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@ -5,9 +5,13 @@ CLANG_FLAGS += -no-integrated-as
endif
top_srcdir = ../../../..
include $(top_srcdir)/scripts/subarch.include
ARCH ?= $(SUBARCH)
LINUX_TOOL_ARCH_INCLUDE = $(top_srcdir)/tools/arch/$(ARCH)/include
CFLAGS += -O2 -Wall -g -I./ $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./ \
$(CLANG_FLAGS) -I$(top_srcdir)/tools/include
$(CLANG_FLAGS) -I$(top_srcdir)/tools/include \
-I$(LINUX_TOOL_ARCH_INCLUDE)
LDLIBS += -lpthread -ldl
# Own dependencies because we only want to build against 1st prerequisite, but